a(n) = Sum_{k=0..n} ( binomial(n,k) - binomial(n,k-1) )^4.

A382434

a(n) = Sum_{k=0..n} ( binomial(n,k) - binomial(n,k-1) )^4.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =33a(4) =195a(5) =1763a(6) =15623a(7) =156257a(8) =1630947a(9) =17911299a(10) =203739015a(11) =2389928995a(12) =28749060871a(13) =353362388551

External references